Combination caliper-gage.



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10.84.5899. I PATBNTBD MAR. 5, 1907.

, B. J. ROBHM. COMBINATION GALIPER GAGE.

APPLIoATIoN FILED APR.30,1906. A

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THE NoRRls PETERS co., WASHING-10N, bfc.

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U NITnD STATES PATENT OFFICE.'

BERNARD J ROEHM, OF CINCINNATI, OHIO, ASSIGNOR OF ONE-HALF TO JAMES MULLIGAN, OF CINCINNATI, OHIO.

COMBINATION CAMPER-GAGE.

Speciiication of Letters Patent.

Patented March 5, 1907.

Be it known that I, BERNARD J. Roni-IM, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Combination Caliper- Gages, of which the following is a specification.

My invention relates to combination-gages for mechanics use.

The object of my invention is to provide a single instrument which is adapted by varying the combinations of parts composing it to take the place of a large number of round and square external and internal gages, and thereby economize in the size and cost of same.

My invention consists in a gage comprising a slotted case provided with a plurality of gages of varying sizes for measuring external and internal dimensions adapted to be held in place by suitable means or adjusted to different positions therein or removed therefrom, as desired..

My invention also consists in providing means for increasing the variations in measurement by means of a micrometer attachment.

My invention further consists in the parts, construction, combination, and arrangement vof arts, as set forth and claimed.

n the drawings which serve to illustrate my invention, Figure 1 is a side elevation of the gage. Fig. 2 is a side elevation of the gage when set for both external and internal measurements. Fig. 3 is a detail view of one of the gages, showing a curved end. Fig. 4 is a similar view of one of the gages having rectangular ends. Fig. 5 is a perspective view of the slotted case, partly broken away to 'show the interior, including thumb-screw and spring-bearing. Fig. 6 is a side elevation of the gage provided with micrometer attachment set for internal measurements. Fig. 7 is a side view of the gage with micrometer attachment set for both external and internal measurements. Fig. 8 is a sectional view of one end of the instrument, showing the normal position of the spring-bearing, the dotted lines showing its position when the gages are inserted in the case.

I prefer to construct the gage made according to my invention as follows:

A slotted case 1, having sides 2 and 3 and ends 4 and 5, is adapted to receive gages 6 transversely of said sides and be secured therein or released therefrom by a. springbearing 7, located in a dovetail 8 and by thumb-screw 9 in end 5 of the slotted case. The sides 2 and 3, respectively, are provided with index l0 for designating the different gages to be used in making the various external and internal measurements by use of one or more of the gages, as the case may be-as, for instance, if it is desired to make either a fifteen-sixteenths-inch external or internal measurement refer to the index, Fig. 1, where lifteen-sixteenths inch is shown, and by combining the gages marked D and "'E, respectively, and adjusting said gages to the positions shown in said Fig. 2 both internal and external measurements can' be made. Each gage is preferably provided with a rectangular end 11 and also a curved end 12 to permit measurements ofinternal circular diameters.

My gage is preferably provided with a micrometer attachment 13, consisting of the barrel 14, graduations 15, calipering-point 16, and calipering-point 17, both mounted upon a stem 18, adapted to take the place of one of the gages 6 and be held in place as shown in Figs. 6 and 7.

The inner surface of end 4i is preferably recessed between its ends to insure the gages in position at right angles to the sides 2 and 3.

I prefer to form one end of each gage 6 with curved ends, as shown in Fig. 3 but each end may be formed curved or rectangular, as desired. When one end of each gage 6 is rectangular and one end curved, both the external and internal gages formed to obtain the desired measurement may have either or both curved or rectangular ends exposed for that purpose.

The spring-bearing 7 is adapted to normally project beyond t-he inner surfac e of the end in which the dovetail 8 is formed in oi der to bear against the adjacent gage, and thereby hold all of the gages in position while setting the gage for making either external or int e'rnal measurements.

The gages may be made of such size as to obtain any measurements desired; tut for convenience in the actual use of the instrument the sizes represented by the accompanying drawings, which are full size, illustrates a gage adapted to make l, oth external and internal measurements from one-fourth IOO ineh to thi'ee inches, and by making use ot the mieiometei' attaehment the changes in measurement may he va'iied almost indenitely from 0 to thi'ee inohes for external measulemnts and from thiee inches to six inehes toil internal measuz'ement.

The manner of using my gage is as follows:

Fig. 1 shows the gage in Closed position, suit-- able foi carrying in the posket or in a eenvenient case. NVhen it is desiied to make eithei1 an inteinal o;1 extelnal measuement of a given size, examine the index 10 for the size desired. Then seleet the gages healing the letters opposite the size desired and place them adjacent each other in the ease-as, fol1 ins tanee, a fitteen-sixteenths-inch gage would be represented by the parts marked D and E, respectively, in Fig. 2 toi1 the internal gage, and upon the othe'il side the external gage would be i'epi'esented hy the space he tween the paits marked l and 0, respeetively. If a thee-fou'gths-ineh gage is desiied, remove eithe'f gage A from the slotted ease 1. and adjust i and C to- Wafd end 4, inserting A at the side ol E and adjusting all of the gages lengthwise in the manner illustrated in Fig. After the slotted ease has heen 'filled Wit-h the gages they may he held therein in any position desired, as shown in Fig. l and Fig. 2, o; otherwise by simply tugning the thumh-seiew against the sp'ring-hea'ing 7 in the dovetail, theiehy Causing it to hear against the adj aeent gage. To remove oi' adjust the gage in the case, simply ieveise the Ope'ation just des'n'i'oed. It' it is desired to make an external measu' 'ement of thiee inehes With the gage, merely shift all of the gages except the outei' gages A and A endwise, leaving only the end gages A and i projeeting from one side ol' the slotted ease. At the same time this Will foifm a thee-inoh intenal gage upon the opposite side. By ioming the neeessafy combinations the valious measurements indicated hy the index. may he made, and when it is desired to make a lafgei" oi smallein measui'ement than thus indicated by the index 'remove one of the (juarterinf3h gages A and substitute in plage thereof the mieiometei' attachment, which may be adjusted to any measuement desiled. Fo? instance, it a few thousandths less than thee-eighths ineh is desired insert the thi'ee-eighths-ineh ha? next to the mieiomete-hafrel, as illustated in Fig. (i, fastening the gages in the ease hy the thumbse-revv 9, next adjust the calipefing-point 16 to beat against said thee-eighths-ineh ha?, then release the thumh-sereW 9 fi'om the spiing-bearing'and adjust the thiee-eighthsineh hal1 to the position shown in Fig. 7, then -fetighten the thumb-sorew, then. tuin the mieometenhariel 11i as many thousandths of an inch less than the three-eighths-ineh hai' as will make the desied dimensions, and then adjust the iiistinineiit to the Work.

It will he appaent that my invention is oapaile of considerable modiiitation Without material departure from the seope and spirit thereof.

I claimd Il. In combination (alipei-gages, a slotted ease having a dovetail in one end, a springheaiing in said dove/tail adapted to no mally pojeot beyond the inne: sulfate of said end, a thumb-screw adapted to engage the end of said fase and said spting-iieaiing respettively, and a plug'ality of gages adapted to he inseited in said slotted c ase and he held transveysely theyein by said spring-hearing and thumh-s-faewv iespeetively.

2. In combination ealipengages, a slotted case, gages in said ase adapted to measuie external and inte; nal dimensions, means for holding said gages in said ease, an index. upon eaeh gage adapted to indh ate its dimensions and an index upon said c ase adapted to indicate the dimensions of the gages in di'tl'eient combinations.

3. In comliination Caliper-gages, a slotted ease, gages in said case adapted to measure exte Inal and integnal dimensions, means foi` holding said gages in adjusted positions in said ase, an index upon each gage adapted to inditate its dimensions, an index upon said case adapted to indi; ate the dimensions of gages in different eomlainations and a miei'ometel attaizzhment adapted to he held in said slotted ease to inorease the valiations in measufements.

4. In comtination ealipe-gages, a slotted ease, gages in said (fase adapted to measue extejnal and intenal dimensions, means foi' holding said gages in adjusted position in said case and a mioometei attachment adapted to he held in said ease to inoi'ease the vaiations in measufements.

5. In combination alipe-gages, a slotted ease having a dovetail in one end, a springheaing in said dovetail adapted to noym ally' piojeet beyond the inne? sui-taie of said end and a plu'ality of gages adapted to he inseit ed in said slotted ease and he held titansvesei y therein by said spring-heaving.

BERNARD J. ROEIIM. Wvitnesses:

JAMES N. RAMSEY, MARGARET O`COXNO12. 

